Leases, Schedule of Lease Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease assets	$ 26.8	$ 0.0
Finance lease assets	6.9
Total lease assets	33.7
Operating lease liabilities, current	3.6
Finance lease liabilities, current	1.2
Operating lease liabilities, noncurrent	26.0	$ 0.0
Finance lease liabilities, noncurrent	5.7
Total lease liabilities	$ 36.5